Analysis of the three-point-bend test for materials with unequal tension and compression properties
Analysis of the three-point-bend test for materials with unequal tension and compression properties
复制标题
DOI：
--
复制
发表时间：
1974
期刊：
影响因子：
--
通讯作者：
C. Chamis
中科院分区：
文献类型：
--
作者：
C. Chamis
描述了适用于线性但不相等的拉伸和压缩应力-应变关系的材料的三点弯曲试验的分析能力。该能力包括许多简单形式的方程及其图形表示。描述了检查局部应力集中和失效模式启动的程序。给出的示例说明了该功能的实用性和易用性。与具有相等的拉伸和压缩性能的材料进行比较。结果表明，可能低估的弯曲模量或强度范围从25%至50%大于预测值时，占不平等的属性。该功能还可用于减少来自三点弯曲试验的试验数据，从这些试验数据中提取对设计有用的材料特性，选择试样尺寸和确定结构构件的尺寸。
An analysis capability is described for the three-point-bend test applicable to materials of linear but unequal tensile and compressive stress-strain relations. The capability consists of numerous equations of simple form and their graphical representation. Procedures are described to examine the local stress concentrations and failure modes initiation. Examples are given to illustrate the usefulness and ease of application of the capability. Comparisons are made with materials which have equal tensile and compressive properties. The results indicate possible underestimates for flexural modulus or strength ranging from 25 to 50 percent greater than values predicted when accounting for unequal properties. The capability can also be used to reduce test data from three-point-bending tests, extract material properties useful in design from these test data, select test specimen dimensions, and size structural members.